Re: problem with new (used) band saw

Both connections are actually correct and accomplish the same thing. Wire #4
goes through a thermal overload before it goes to the main motor winding.
Wire #J comes off of the overload to be used as the means for connecting the
two main windings in parallel when connected for low (115) volts.

The starting winding in this motor is always 115 volts. When the motor is
connected for 230 volts, the two halves of the main winding are connected in
series so that they each see 115 volts. The 2/3/8 (or 2/3/5) connection is
the mid point of the series connection, which allows the starting winding to
receive 115 volts from the 230 volt connection. Thus, the other end of the
starting winding (#5 or #8) can be connected to either the #1/line
connection, or be connected to wire #J. Either way, interchanging #5 and #8
will reverse the motor rotation.

Doug

"Tom Veatch" <nope@xxxxxxxx> wrote in message
news:7k6b3595aros2gqvb8bfnignnu11u6a65j@xxxxxxxxxx
On Sat, 13 Jun 2009 12:24:34 -0700 (PDT), bob
<timeagainwatches@xxxxxxxxx> wrote:

Here's what I did: The motor had 2 schematics on it, for "low voltage"
and one for "high voltage." The high voltage schematic showed this:
wires #2/3/5 together; wire #1 alone (which I found to be connected to
the cord's brown wire also); wire #4 to "line" (I found #4 to be
connected to the cord's black wire); wires #J/8 together. This is, in
fact, how it was wired when I opened it up.

The second schematic showed this: wires #1/3/5 together (which I left
also connected to the cord's brown wire); wire #4 to "line" (which I
left connected to the cord's black wire); wires #2/J/8 together. I
reconnected things following this schematic (in other words, I moved
#2 from 2/3/5 to J/8 and connected 1/brown to 3/5; I left 4/black
alone).



I have a Baldor 3HP motor on my bandsaw but there seems to be a
difference between your diagram and mine. To switch mine from High to
Low is was only necessary to disconnect 3 from the 2-3-5 bundle and
connect it to the 1-8 pair. Then connect J to the 2-5 pair replacing
the 3 that was removed from that bundle. J is capped off and not used
in the High voltage configuration of my motor.

There's a bigger difference between the diagram for your motor and
mine than I'd expect for similar type motors (albeit different HP)
from the same company. Can you post a picture of your diagram in ABPW?

My diagram:

High:

1----|_______Line 1
8----|

2----|
3----|
5----|

4--------------- Line 2

J------ (unused)


Low:

1------|
3------|----------Line 1
8------|

2------|
5------|
J------|

4-----------------Line 2

Tom Veatch
Wichita, KS
USA




.

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